Building a better crossbow: Patent issued to Iowa City inventor April 29, 2008
Posted by John in Business, Engineering, Government, History, Technology.Tags: inventions, inventors, James J. Kempf, James Kempf, United States Patent and Trademark Office, weapons
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Abstract from U.S. Patent and Trademark Office:
A crossbow having an increased powerstroke and reduced noise. The powerstroke is increased by inverting the limb orientation from the standard crossbow arrangement and locating string guides at least partially forward and rearward of the ends of the limbs. The bowstring is drawn from the tops of the string guides to maximize the powerstroke, reducing noise and increasing the retained and delivered energy over existing crossbows.
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| Inventors: | Kempf; James J. (Iowa City, IA) |
| Assignee: | J & S R.D.T. Archery (Coralville, IA) |
See also: Historical information on crossbows from Encyclopedia Britannica or Wikipedia.
Harding Middle School of Cedar Rapids wins IEEE-USA National Engineering Award February 24, 2008
Posted by John in Education, Engineering.Tags: Competitions, Courtney Strait, Emily O'Brien, Gary Bishop, Jean Oberbroeckling, Stephanie Wenclawski
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From news release of Institute of Electrical and Electronics Engineers:
Harding Middle School of Cedar Rapids, Iowa, won the IEEE-USA Best Communications System Award during the National Engineers Week Future City Competition National Finals on Wednesday. The award was presented to Harding at the Hyatt Regency Washington on Capitol Hill for the most “efficient and accurate communications system.”
The team included students Emily O’Brien, 13; Courtney Strait, 13; and Stephanie Wenclawski, 14; engineer-mentor Gary Bishop; and teacher-sponsor Jean Oberbroeckling. Bishop is an IEEE member who works for Rockwell Collins in Cedar Rapids. …
